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Formatters & Minifiers

XML Formatter / Beautifier

Beautify, validate, and minify XML with configurable indentation and self-closing tag control.

XML Formatter / Beautifier
Client-side

About this tool

The XML Formatter reformats minified or inconsistently indented XML into clean, readable output, while validating structure at the same time. Paste an XML document — a SOAP response, an RSS feed, an Android layout, a Maven pom.xml, or an exported config — and get back properly indented XML with a clear Valid/Invalid status badge.

Validation uses fast-xml-parser's strict XML validator, which reports the exact error type, line, and column when something is malformed — unclosed tags, mismatched nesting, or invalid characters. You don't have to guess where a document broke; the error points you directly at the problem.

Formatting options include indent width (2 spaces, 4 spaces, or tab) and a toggle for self-closing empty elements — choose between <empty/> and <empty></empty> depending on your downstream tooling's expectations. A separate Minify button strips all whitespace between tags to produce the smallest valid representation, useful when embedding XML into a payload or config value.

Everything runs client-side using fast-xml-parser compiled for the browser. No XML content — which may include internal API contracts, credentials in config files, or business data — ever leaves your tab.

FAQ

Does this tool send my XML to a server?
No. Parsing, validation, and formatting all run locally using the fast-xml-parser library compiled to run in your browser. No network requests are made with your document content.
How do I know if my XML is valid?
A green "Valid XML" or red "Invalid: [error]" badge appears above the controls as you type. Invalid XML shows the specific error type along with the line and column where the parser detected the problem.
What does the self-close toggle do?
When enabled, empty elements are output as <tag/>. When disabled, they are output as <tag></tag>. Some legacy XML consumers require one form or the other — this lets you match your target system's expectations.
What does Minify do?
It strips all whitespace between tags (newlines, indentation) to produce the most compact valid XML, similar to what you'd want before embedding the document in a URL, header, or size-constrained payload.
Does formatting change the structure or content of my XML?
No. Formatting only affects whitespace and indentation. Element names, attributes, text content, and document structure are preserved exactly, including the XML declaration if present.